New English Made Triumph Late Camplate Detent Plunger Holder Housing Nut. If your rebuilding that “Barn Find” Engine chances are this Holder is either missing or rusted to the point beyond using! This part is an excellent replacement that is made to Complete Factory specs! Composed of Heat Treated Steel then plated with a lovely Zinc finish! Holder has a thread pitch of 18 TPI (UNF). Fits Triumph 650 Unit Twins (Bonneville, T120, Tiger, TR6, Trophy & TR6C) from 1969-1970 only. Also fits Triumph Trident T150 from 1969-1970 only. Please refer to your parts catalog for proper fitment.*****Please note that this part will not work on 1963-1968 Triumph 650 Unit Twins & Triples!*****We also carry the Early Plunger Housing for 1963-1968 650 Twins! Search 57-0372Made in the UKO.E.M Part number is 57-2172 or T2172